NGINX

A virtual host in NGINX serves content based on settings found within /etc/nginx/nginx.conf , we can use these settings to do things like handle SSL and pass traffic to other hosts if using a specific sub domain.

Basic NGINX Settings

These settings can be modified to suit the needs of your server. Below is a basic nginx.conf configuration.

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events { }

http {
  include mime.types;

  # Basic Server Configuration
  server {
    listen 80;
    server_tokens off;
    server_name sub.domain.com domain.com;
    
    location / {
      root /var/www/html;
      index index.html index.htm;
    }
    
    # Uncomment to pass for SSL
    #return 301 https://$host$request_uri;
  }
}

If trying to route traffic, you can use a similar server {...} configuration alongside the above that specifies the sub-domain and IP / port to pass traffic to - 

# Private subdomain for routing custom ssh port
server {
  server_name sub.domain.com;
  server_tokens off;
    
  location / {
    include proxy_params;
    proxy_pass http://0.0.0.0:3333;
}